Alternative Aircraft Anti-Icing Formulations with Reduced Aquatic Toxicity and Biochemical Oxygen Demand (2010)

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Appendix F Candidate Corrosion Inhibitors Recommended for Further Investigation

F-1 INITIAL CANDIDATE CORROSION INHIBITORS Mazon RI 325: Candidate 04.001—a product of the BASF Corporation. Unknown composition. Free of nitrites, nitrates, chromates and phenolics. Protects aluminum and steel. No information on toxicity or biodegradability was found. Ammonyx CDO Special: Candidate 04.002—a product of the Stepan Company. Cocoamido- propylamine oxide. No information on aquatic toxicity or biodegradability was found. The rat oral LD50 is between 500 and 5,000 mg/kg. Ninol 1301: Candidate 04.003—a product of the Stepan Company. A PEG-6 cocamide. No information on aquatic toxicity or biodegradability was found. The mouse oral LD50 is 3,300 mg/kg. Ninol 201: Candidate 04.004—a product of the Stepan Company. Produced by condensing one mole of oleic acid with two moles of diethanolamine. No information on aquatic toxicity or biodegradability was found. The mouse oral LD50 is 3,300 mg/kg. Ninol SR-100: Candidate 04.005—oleic diethanolamine produced by the Stepan Company. No information on aquatic toxicity or biodegradability was found. Korantin SMK: Candidate 04.006—a product of the BASF Corporation. Reported to provide superior corrosion protection for aluminum in alkaline media. An organophosphate based corrosion inhibitor. No information on aquatic toxicity or biodegradability was found. DrewPlast 154: Candidate 04.007—a product of the Stepan Company. Lauryl diethanolamide. No information on aquatic toxicity or biodegradability was found. The rat oral LD50 is 2.700 mg/kg. Cobratec 948: Candidate 04.008—a product of PMC Specialties Group, Inc. Unknown composition. Recommended for use in aircraft and runway deicing fluids. Sold as a liquid containing 85% of a proprietary multi-metal corrosion inhibitor. Will need to be checked for the presence of triazoles. No information on aquatic toxicity or biodegradability was found. 3-Methoxypropylamine: Candidate 04.009—the 96 hr LC50 for golden orfe is between 100 and 220 mg/L. The rat oral LD50 is 690 mg/kg. Triethanolamine: Candidate 04.010—the 96 hr LC50 for lepomis macrochirus ranges from 450 to 1000 mg/L. The rat oral LD50 is 4,920 mg/kg. This chemical is expected to readily biodegrade. Potassium phosphate: Candidate 04.011—reported as a possible corrosion inhibitor in runway deicing chemicals. Potassium silicate: Candidate 04.012—reported as a possible corrosion inhibitor in runway deicing chemicals.

APPENDIX F F-2 Potassium carbonate: Candidate 04.013—reported as a possible corrosion inhibitor in runway deicing chemicals. Potassium laurate: Candidate 04.014—reported as a possible corrosion inhibitor in runway deicing chemicals. Potassium stearate: Candidate 04.015—reported as a possible corrosion inhibitor in runway deicing chemicals. Sodium silicate: Candidate 04.016—reported as a possible corrosion inhibitor in runway deicing chemicals. Sodium borate decahydrate: Candidate 04.017—reported as a possible corrosion inhibitor in runway deicing chemicals.